Oldfarmer,
The action is refered to in various early books as the; Bastin Gun.The origional design is attributed to Bastin Freres a French gunmaker.[Not Patented in England] A friend of mine has a similar gun bearing the name;G.Masu,Wigmore Street,London.David Baker comments on this design on page 84 of Volume 1, The British Shotgun.
David also states that he also owns a version of this gun bearing the Masu name.

Last edited by Roy Hebbes; 06/12/12 02:02 PM.
Roy Hebbes